Four-order cumulant DOA estimation method based on co-prime array and augmented extension array

A fourth-order cumulant and extended array technology, applied in the field of fourth-order cumulant DOA estimation, can solve the problems of affecting the accuracy of DOA estimation, unable to obtain accurate detection signal sources, and unable to obtain a large enough continuous lag number, etc., to achieve good performance. Effect

Active Publication Date: 2021-06-04
NORTHWEST UNIV(CN)
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Problems solved by technology

[0004] However, the above-mentioned methods of constructing a fourth-order differential virtual array cannot obtain a sufficiently large number of continuous lags, resulting in the inability to obtain higher accuracy and detect more signal sources, thereby affecting the DOA estimation accuracy

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  • Four-order cumulant DOA estimation method based on co-prime array and augmented extension array
  • Four-order cumulant DOA estimation method based on co-prime array and augmented extension array
  • Four-order cumulant DOA estimation method based on co-prime array and augmented extension array

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Embodiment 1

[0053] See figure 1 , figure 1 is a schematic flowchart of a fourth-order cumulant DOA estimation method based on a coprime array and an augmented extended array provided by an embodiment of the present invention. The present embodiment proposes a fourth-order cumulant DOA estimation method based on a coprime array and an augmented extended array, and the fourth-order cumulant DOA estimation method based on a coprime array and an augmented extended array includes the following steps:

[0054] Step 1. Construct the sparse array of EEAS-NA-CPA structure based on coprime array and augmented extended array.

[0055] Specifically, this embodiment proposes an Enhanced Expanding and Shift Scheme (EEAS for short), the sparse array structure consists of a standard co-prime array (Co-Prime Arrays, CPA for short) and an augmented Widely expanded nested array (Enhanced Expanding and Shift Nested Array, referred to as EEAS-NA) construction composition, referred to as the sparse array of ...

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Abstract

The invention discloses a four-order cumulant DOA estimation method based on a co-prime array and an augmented extension array. The method comprises the following steps of constructing a sparse array of an EEAS-NA-CPA structure based on the co-prime array and the augmented extension array, acquiring an array receiving signal according to the sparse array, calculating a fourth-order cumulant of an array receiving signal, reconstructing the fourth-order cumulant of the array receiving signal to obtain a new column vector, constructing a spatial smoothing matrix according to the new column vector, and performing subspace decomposition on the spatial smoothing matrix to realize DOA estimation. According to the method, the EEAS-NA-CPA can obtain a larger continuous lag number, more signal sources can be detected with higher precision, and the DOA estimation based on the EEAS-NA-CPA structure can obtain better performance.

Description

technical field [0001] The invention belongs to the technical field of array signal processing, in particular to a fourth-order cumulant DOA estimation method based on coprime arrays and augmented arrays. Background technique [0002] Direction-of-Arrival (DOA) estimation of signals is a basic task in array signal processing such as radar, sonar and wireless communication. [0003] Traditional DOA estimation methods, such as Multiple Signal Classification (MUSIC) and Rotation Invariant Subspace Algorithm (Estimating Signal Parameter via Rotational Invariance Techniques, ESPRIT), are mostly based on second-order statistics, which bring Identify limitations such as the number of signal sources, modeling errors, and Gaussian colored noise. In the late 1980s, relevant researchers combined the concept of fourth-order cumulants with DOA estimation methods, and found related methods for non-Gaussian sources, which overcome many limitations of traditional DOA estimation methods. I...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/14
CPCG01S3/14Y02D30/70
Inventor 张万绪刘冠豪周延汪霖李艳艳陈晓璇姜博孟娜刘成
Owner NORTHWEST UNIV(CN)
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